<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <ul v-for="(item,index) in list">
            <li>
                {{item}}
                <button @click="del(index)">删除</button>
            </li>
        </ul>
        <button @click="listItem">生成</button>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                list: []
            },
            methods: {
                listItem() {
                    this.list.push(Math.floor(Math.random() * 20) + 1)
                },
                del(i) {
                    this.list = this.list.filter((item,index) => i !== index)
                }
            }
        })
    </script>
</body>

</html>